Comments:

Family Tree DNA has changed the format for reporting
results, and now reports only 4 results for marker 464 (464a, 464b,
464c, 464d) rather than 5. Marker 464 is a multi-copy marker--there is
more than one copy of this marker on the chromosome. Other multi-copy
markers are 385 a & b and 459 a & b. According to Family Tree DNA, "464 is a
'close family' lineage splitter, and unlike all the other markers we use, it
follows the infinite allele model (for more on that see this page: http://nitro.biosci.arizona.edu/ftdna/TMRCA.html
then look for the link to mutation models). 464 has actually done what we
like it to do...show difference... We see 1-4 step changes in this marker with 1
step happening the most, but 2-4 happening about half the time."

J-2, F-2, R-1, SF-1, JA-1, JA-2 and WH-1 show the typical pattern of
results or "Ancestral Signature" for the American Bittick/Biddix
lines.

J-1 has a one-step mutation (one marker off by one number) on marker 449. That's a red one that mutates
at a faster rate. A mutation in one of the red markers is not as
significant as a mutation in the black markers.

J-2 matches the ancestral signature. This means that John
(1748) had the same pattern of results. The mutation in J-1 occurred
after John's son, Francis (1790), or it is an error in the
results.

F-1 has a 3-step mutation in 464. This is a multi-copy
marker. It has a high
mutation rate and can be used as a close family lineage splitter.
Reading the results for marker 464 can be confusing, since the results for
each copy are reported in ascending order. In the table above, it
appears that F-1 has 3 different mutations. However, there is only one
mutation, highlighted in black. Individuals showing this pattern of results will be more closely related to
each other than to the other lines. For more information on multi-copy
markers, see "Understanding Your Results: The Value of Multi-Copy
Markers" in Family Tree DNA's newsletter, "Facts &
Genes," March 3, 2004 Volume 3, Issue 2 http://www.familytreedna.com/facts_genes.asp?act=show&nk=3.2.

F-2 matches the ancestral signature. This means that
Francis (1759) had the same pattern of results. The mutation in F-1 occurred
sometime in the Thomas Stanfield Bittick line, or it is an error in the
results, and is not typical of the
Francis (1759) line.

JR-1 has a one-step mutation in 464.

SF-1 results originally showed a two-step mutation (one marker off by 2 numbers)
on marker 388. Family Tree DNA ran the test again, and found it matches
the other participants.

SF-2 has a one-step mutation on allele #389-2. It probably
is not genealogically significant.

C-1 & C-2 (Biddick from Cornwall, England) only match 5/12 markers
and are not closely related to the American Bittick lines tested. C-1
is known to be a distant cousin of C-2, and the test results indicate that
they are closely related to each other, but not to the other lines.

C-3, a different Biddick family from Cornwall, England, only
match 4/12 markers and are not closely related to the American Bittick
lines. C-3 is not closely related to C1 & C2 since they only match
on 8/12 markers.

Summary of Results:

The DNA results indicate that the American Bittick lines tested (John,
Francis, John R., Robert, Samuel F., Jonathan, and Willis Henry) descend from a
common ancestor. However, the Biddick families from Cornwall are not closely
related to the American Bittick lines tested.

Of the Cornwall Biddick families tested C1 & C2 are closely related to each
other but not to C-3.

The John R. line appears to have a mutation.
However, with only one result in this line, we cannot confirm
this. We need results from at least one more descendant to verify the DNA
pattern.

The Francis and John lines have the same pattern of results as Robert, Samuel F.,
Jonathan and Willis Henry. The mutation in J-1 and F-1 may be an error
in the results.

No one from the Samuel, born 1755-1774, line has been tested.

Based on the results currently available, all the American Bittick/Biddix
lines tested (except possibly John R.) have the same ancestral signature pattern.

From Family Tree DNA:

"It is obvious from our (Family Tree DNA) observation of 1000's of samples
that some markers change or mutate at a faster rate than others. While that
actual 'faster rate' has not yet been definitively calculated, not all markers
should be treated the same for evaluation purposes.

The markers in red have shown a faster mutation rate then the average, and
therefore these markers are very helpful at splitting lineages into sub sets, or
branches, within your family tree.

Explained another way, if you match exactly on all of the markers except for one
or a few of the markers we have determined mutate more quickly, then despite the
mutation this mismatch only slightly decreases the probability of two people in
your surname group who match 11/12 or even 23/25 of not sharing a recent common
ancestor."